GE Healthcare Medical Diagnostics announced the market reintroduction of Optison™ (Perflutren Protein-Type A Microspheres Injectable Suspension, USP), a diagnostic ultrasound contrast agent for use in select echocardiograms. Optison is indicated for use in patients with suboptimal echocardiograms to opacify the left ventricle and to improve the delineation of the left ventricular endocardial borders. The safety and efficacy of Optison with exercise stress or pharmacologic stress testing have not been established... 
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